Milling-machine



UNITED STATES PATENT FFIcEg l y AMos H. BRAINARD, ,or HYDE PARK, MASSACHUSETTS.

MILLING-MACHINE.

sPJscIFIcAErJIoN- forming part of Letters Patent NQ. 381,108, dated Apr'iil'lf'lasa. v,

Application filed October 6, 1885. Serial No. 179,131. "(o model.)

f To all whom/1 it concern: i

der the'cutters of milling and gear-cutting ma- Be it known that I, AMos H. BRAINARD, a citizen ofthe United States, residing in lHyde Park, in the county ofNorfolk and State of Massachusetts, have invented a new and useful Improvement in Chip-Conveyers'forMilling-Machines, of which the following is a speci- I several views.

tication.

Myiuvention relates .to an automatic device f forremoving the chips which accumulate unchines; and it consists of a series of elliptical blades secured diagonally to ashaft or spindle and revolving with said shaft orspindle.

These blades are of peculiar construction, as will be seen by reference to the accompanying drawings. They are made preferably of `sh eetsteel, but may be made of y,any cast metal; ory

they may be cast solid with the shaft or spindle.v A conveyor-screw hasl been employed for this purpose; but it is impossible to use it when cutting wrought-iron or steel, asy it will become clogged under these conditions.` A series of buckets hinged von a carrier and pushed longitudinally to and fro has' also beenl used., but this device is open not only to the same objection as the screw, but, as the buckets must swing loosely on vthe carrier in order to drop back automatically, the dust from castviron chips soon fills their bearings and the device 'becomes inoperative.

Any clearing device that remains constantly f `iinthechips issure to foul and become inoperative inashort time.` In my invention, however, this difliculty is obviated, as the blades are of suchshape that they alternately dip into and are raised/bodilyout of the chips at each revolution of the shaft orfspindle to which they are secured. At each revolutionof the shaft or spindle each blade moves the chips to within reach of the blade in front of it, then is swung or lifted out of thechips before that revolutionr of the shaft or spindle is completed.

' In the accompanying drawings, Figure 1 is a plan of the carriage of a gear-cutting machine, essentially the same as in thepatent granted me January 6, 1885, No. 310,247,'and shows my device as in operation, the cuttingtool being removed. Fig. 2 is a perspective view of my device in' detail and on an enlarged scale. Fig. 3 is a plan and end elevation of the blades are set. y y of the carriage of agearcutting` machine, show` ing the blades in and out of the chips, thelatter positioujl shown in dotted lines. The out` ter 'is showngin this view.

one ofthe blades, showing the anglelatfwhich l w f Fig.z4 isa side elevation n Similar letters refer to similar parts in the:

A is the Acutter-carria, ',re of a gearlcuttiug 6o machine. Y' I Y 'B is the cutter-arbor, the cutter being rel moved in Fig; l the better to shovv my device. l

K C is 'the' spout or groovein which the ,chips collect as they drop from the cutter. Extending the entire length of this spoutCfbut not1 coming incont-act with it at any point," is my .I device, consisting of the shaft or spindle d, to y. Y

which are secured, at an angle of about'fortyf ve degrees, the' blades e e e, ,850., the shaft or spindle being, held in place initsbearing by the spur-Wheel D are securedpins h h, which, as the said spur-Wheel D revolves, comein contact alternately with the teeth of thestar-y wheel f, imparting to the latter, and through it to the shaft or spindle d and the bladese e means ofthe star-wheelf and the collar g. To I y inthe same directiou,and' is constantly at Workl fr.

moving the chips Atoward the outlet, notwithstanding the reversal ofthe feedfscrew and backward movement ofthe cuttertcarriage after the cutting of each tooth in the gearblank. Y

'It is to tev distinctly understood that my" chipfclearer, as'illustrated in Fig. 2,differs from a worniin construction, mode of operation, and iu result.

formed by a continuousspiral vaneA like the thread of a screw, the continuity of the vane g The worm, as used for conveyers, is

being, however, often interrupted'by spaces circumferentially distributed, these spaces re,-

sulting from the fact that'the vane is built upy out of a series of flights.

'10c n y Theaction of such f worm-,vane is continuous throughout therevon lution of the worm. Such aworm clogs when it attempts the handling of wrought-iron or steel cuttings and becomes totally inoperative.

of the heel of the vane immediately in front of it. There isthus no continuity of vane. In operation these oblique vanes do not act to produce a continuous procession of the chips, but each vane takes stationary chips as it indsthem and advances them and leaves them stationary Within reach of the next vane, which does not reach the chips until they have been some time stationary. My improved clearer handles wrought-iron and steel cuttings with facility-a result not attained by any device of which I have knowledge.

Having thus described the nature, construction, and operation of my invention, I wish to secure by Letters Patent and claim as follows:

1. In a chip-clearer for milling and gearcutting machines, the combination, substanl tially as set forth, with a machine part on which the chips fall, a gutter therein-to receive the chips, abearing for the support of 3o arotary clearer-shaft, and means for rotating such shaft, of a series of vanes, e, formed with or secured to such shaft, said vanes being arranged parallel to each other and oblique to the axis of their shaft, the vanes corresponding to a portion only of the clearer-circle, so that one longitudinal side of the clearer is free from vanes, whereby when the clearer-shaft is so turned that the vanes project upwardly from the shaft no vanes will project downwardly into the chip-trough.

2. -In a gear-cutting or milling machine, the combination, substantially as set forth, with a machine part on which the chips fall, a trough therein to receive the chips, a bearing for the support of the clearer-shaft, and means for giving intermittent rotation to such clearer shaft, of a clearershaft, d, provided with a longitudinal series of vanes, e, arranged parallel to each other and oblique to the axis ot' said shaft, the vanes filling a portion only of the clearer-circle.

AMOS H. BRAINARD. In presence of- J EREMIAH GORBETT, ALONZO H. RIcHARDsoN. 

